SAT English Practice Question

A researcher is writing a paper for a scientific journal. The researcher wants to ensure that the paper is clear and concise. The researcher has written the following sentence: “Although the study’s results are very important, they are only one piece of the puzzle.” Which of the following is the best way to revise the sentence to make it more concise?

1. A.Although the study’s results are very important, they’re only one piece of the puzzle.
2. B.The study’s results are very important, but they’re only one piece of the puzzle.
3. C.The study’s results are important, but they’re only one piece of the puzzle.
4. D.The study’s results, while important, are only one piece of the puzzle.